Payment methods

Sorry if this has been asked 100 times but I didn’t find anything under search.
I noticed that for purchases you can either register a card or redeem a voucher or code.
Would anyone be so kind as to tell me where I could buy such a voucher/code?

Stores here in the states (like Walmart) sell them

Oh. I thought I’d replied to this. Obviously not
First off - thanks very much for your reply.
Could you tell me what they’re called?
I’d like to see if they’re available here in Switzerland.
I want to buy something to get rid of the adverts but would rather not register a credit card just to pay a few $. Shame there isn’t a Paypal option. That would be ideal!

Google does allow PayPal but I am not sure it is restricted in your home area. You can check on your google account page!